Option-1 ) Try to open a basic SBI Savings account with MAB of Rs5000 etc.. not zero balance, jandhan account, and maintain good balance for 6 months and do spendings via SBI debit card/account not via UPI (transfers are not spendings but if you don't have spends the rely on transfers.) then give a try with SBI card sprint application.
Note: Reason for mentioning no UPI is , many a times we buy things outside via UPI, if their UPI QR is of merchant with current account then it is considered as spend. But if their UPI code is a savings account then it's just acts like transfer.
(This is my view on UPI transactions)
Option-2) Wait for 6 months from rejection and apply for it via SBI sprint app.
Cooling period is generally 6 months.
Agents cannot apply this SBI cashback card.